Pita..... Mommie found out why he was called Spaceman. She found it on a website and its below:

Lee was one of the game’s few counterculture symbols: he talked to animals, championed environmental causes, practiced yoga, ate health foods, sprinkled marijuana on his buckwheat pancakes (an indiscretion for which he was fined $250 by Commissioner Bowie Kuhn), pondered Einstein and Vonnegut, quoted from Mao, and studied Eastern philosophers and mystics. It was in this context that former Red Sox teammate John Kennedy first dubbed him "Spaceman," a nickname writers thereafter used as shorthand to describe his free spirit. At first irritated by the appellation (preferring to be known as "Earth Man"), Lee would eventually approve of the "Spaceman" moniker. "I realized that it’s the ultimate compliment," he remarked. "Everybody thinks they’re earthlings but in actuality we’re only here for a brief moment, and the cinder that we’re on is moving as Spaceship Earth, so we’re all space travelers."